7-(4-Chlorophenyl)-4-methyl-2-(methylthio)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine 7-(4-Chlorophenyl)-4-methyl-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidin-2-yl methyl sulfide AIDS-143597 AIDS143597 NSC664728